From 361bedf0b98afcb4df6d0951dca06117aaff1009 Mon Sep 17 00:00:00 2001
From: HuangRui <vowstar@gmail.com>
Date: Thu, 5 Feb 2015 12:26:20 +0800
Subject: [PATCH] Optimization of memory usage when using double pow(double x,
 double y).

---
 app/libc/c_math.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/app/libc/c_math.c b/app/libc/c_math.c
index ae44335f..622a942d 100644
--- a/app/libc/c_math.c
+++ b/app/libc/c_math.c
@@ -1,5 +1,6 @@
 #include "c_math.h"
 #include "c_types.h"
+#include "user_config.h"
 
 double floor(double x)
 {
@@ -10,7 +11,7 @@ double floor(double x)
 #define MINEXP -2047        /* (MIN_EXP * 16) - 1           */
 #define HUGE MAXFLOAT
 
-double a1[] =
+double a1[] ICACHE_STORE_ATTR ICACHE_RODATA_ATTR =
 {
     1.0,
     0.95760328069857365,
@@ -30,7 +31,7 @@ double a1[] =
     0.52213689121370692,
     0.50000000000000000
 };
-double a2[] =
+double a2[] ICACHE_STORE_ATTR ICACHE_RODATA_ATTR =
 {
     0.24114209503420288E-17,
     0.92291566937243079E-18,